I haven't been paying much attention to this game as of late, so i decided to look at a few videos and was fortunate to come across a little surprise. Apparently Green Arrow has the ability to shoot ice arrows and freeze his victims momentarily, as demonstrated @ mark 1:46 - 1:47 of the video in the link below:

So this game comes out this week, and they recently showed off a character by the name of Killer Frost. She seems to come across as the Sub-Zero of this game, and looking into more finished game footage, the ice effects do come off as pretty good.

Here's a quick video of her going against Wonder Woman, with a grab freeze move occurring at 2:08 and 2:32:http://www.youtube.com/watch?v=yuxoHUJurLkHmm, curious to know if she has an ice blast move to show off as well.

Also of interest is the stages to offer some interactivity, and I know one of the stages can let you break off a liquid nitrogen pipe to drench your opponent in. That's something worth playing around with.